Table 6 Dose coefficients obtained as an average of the values calculated by the software CT-Expo, NCICT, NCICTX, and Virtual Dose. In brackets, the range is shown as the difference between maximum and minimum, divided by the mean value
From: Patient organ and effective dose estimation in CT: comparison of four software applications
| Â | Â | Â | DC (% relative range) | DC (% relative range) |
|---|---|---|---|---|
Male | Female | |||
Organs inside the scan region | Head | Brain | 0.722 (33%) | 0.777 (16%) |
Pituitary gland | 0.589 (29%) | 0.603 (12%) | ||
Lens | 0.863 (28%) | 0.908 (16%) | ||
Maxillofacial | Lens | 0.869 (27%) | 0.909 (18%) | |
Pituitary gland | 0.541 (34%) | 0.565 (6%) | ||
Chest | Lungs | 1.397 (25%) | 1.498 (22%) | |
Heart | 1.386 (6%) | 1.427 (30%) | ||
Breast | 1.25 (29%) | 1.368 (44%) | ||
Thymus | 1.458 (13%) | 1.507 (12%) | ||
Oesophagus | 1.153 (70%) | 1.266 (57%) | ||
Spleen | 0.938 (67%) | 1.192 (59%) | ||
Abdomen-pelvis | Liver | 1.215 (10%) | 1.33 (27%) | |
Stomach | 1.18 (33%) | 1.291 (56%) | ||
Colon | 1.35 (25%) | 1.451 (30%) | ||
Bladder | 1.227 (28%) | 1.323 (19%) | ||
Prostate/uterus | 1.158 (14%) | 1.173 (37%) | ||
Gonads | 1.504 (26%) | 1.169 (8%) | ||
Spleen | 1.212 (13%) | 1.378 (21%) | ||
Pancreas | 1.115 (21%) | 1.274 (42%) | ||
Adrenals | 1.162 (26%) | 1.255 (26%) | ||
Kidney | 1.369 (10%) | 1.533 (27%) | ||
Small intestine | 1.276 (26%) | 1.399 (24%) | ||
Gallbladder | 1.085 (33%) | 1.169 (45%) | ||
Rectosigmoide | 1.165 (27%) | 1.123 (16%) | ||
Partially irradiated organs | Head | Salivary glands | 0.420 (92%) | 0.416 (40%) |
Thyroid | 0.032 (134%) | 0.038 (97%) | ||
Oral cavity | 0.376 (142%) | 0.306 (165%) | ||
Maxillofacial | Brain | 0.56 (53%) | 0.577 (46%) | |
Salivary glands | 0.571 (68%) | 0.635 (77%) | ||
Oral cavity | 0.477 (112%) | 0.561 (68%) | ||
Chest | Liver | 0884 (70%) | 1.077 (79%) | |
Stomach | 0.799 (82%) | 0.971 (53%) | ||
Kidney | 0.327 (153%) | 0.462 (79%) | ||
Adrenals | 0.745 (92%) | 0.983 (51%) | ||
Abdomen-pelvis | Breast | 0.272 (85%) | 0.265 (120%) | |
Oesophagus | 0.183 (163%) | 0.184 (143%) | ||
Lungs | 0.326 (47%) | 0.334 (52%) | ||
Heart | 0.407 (50%) | 0.371 (87%) | ||
Organs outside the scan region | Maxillofacial | Thyroid | 0.046 (144%) | 0.068 (131%) |
Chest | Thyroid | 1.449 (117%) | 1.509 (111%) | |
Salivary glands | 0.138 (45%) | 0.149 (100%) | ||
Oral cavity | 0.119 (78%) | 0.149 (97%) | ||
Pancreas | 0.633 (108%) | 0.825 (49%) | ||
Colon | 0.132 (255%) | 0.074 (85%) | ||
Gallbladder | 0.654 (103%) | 0.938 (54%) | ||
Abdomen-pelvis | Thymus | 0.064 (91%) | 0.065 (76%) | |
Trachea | 0.037 (12%) | 0.043 (20%) | ||
Distributed organs | Head | Bone marrow | 0.060 (121%) | 0.065 (112%) |
Skin | 0059 (27%) | 0.061 (30%) | ||
Maxillofacial | Bone marrow | 0.057 (130%) | 0.064 (131%) | |
Skin | 0.05 (34%) | 0.053 (32%) | ||
Chest | Bone marrow | 0.392 (20%) | 0.458 (34%) | |
Skin | 0.328 (46%) | 0.355 (52%) | ||
Abdomen-pelvis | Bone marrow | 0.56 (0%) | 0.613 (30%) | |
Skin | 0.51 (17%) | 0.47 (20%) |